configure.in

#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.61)
#
# The 0MQ version number is extracted from include/zmq.h using
# the version.sh script. Hence, it should be updated there.
# The version in git should reflect the *next* version planned.
#
AC_INIT([zeromq],[m4_esyscmd([./version.sh | tr -d '\n'])],[zeromq-dev@lists.zeromq.org])

AC_CONFIG_AUX_DIR(config)
AC_CONFIG_MACRO_DIR(config)
AM_CONFIG_HEADER(src/platform.hpp)
AM_INIT_AUTOMAKE(tar-ustar dist-zip foreign)

# This lets us use PACKAGE_VERSION in Makefiles
AC_SUBST(PACKAGE_VERSION)

# Libtool -version-info (ABI version)
#
# Don't change this unless you know exactly what you're doing and have read and
# understand:
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
#
# Changes:
#
# ZeroMQ versions prior to 2.1.0 use 0.0.0 ("unstable")
# ZeroMQ version 2.1.0: 1:0:0
#
# libzmq -version-info current:revision:age
LTVER="1:0:0"
AC_SUBST(LTVER)

# Checks for programs.
AC_PROG_CC
AC_PROG_CC_C99
AC_PROG_CXX
AM_PROG_CC_C_O
AC_PROG_SED
AC_PROG_AWK

# Libtool configuration for different targets. See acinclude.m4
AC_ZMQ_CONFIG_LIBTOOL
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL

# Check whether to build a with debug symbols
AC_ZMQ_CHECK_ENABLE_DEBUG

# Checks for libraries.
AC_CHECK_LIB([pthread], [pthread_create])

# Set pedantic
ac_zmq_pedantic="yes"

# By default compiling with -Werror except OSX.
ac_zmq_werror="yes"

# By default use DSO visibility
ac_zmq_dso_visibility="yes"

# Whether we are on mingw or not.
ac_zmq_on_mingw32="no"

# Set some default features required by 0MQ code.
CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE $CPPFLAGS"

# For host type checks
AC_CANONICAL_HOST

# OS-specific tests
case "${host_os}" in
    *linux*)
        # Define on Linux to enable all library features. Define if using a gnu compiler
        if test "x$GXX" = "xyes"; then
            CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
        fi
        AC_DEFINE(ZMQ_HAVE_LINUX, 1, [Have Linux OS])
        AC_CHECK_LIB(rt, sem_init)
        AC_CHECK_LIB(uuid, uuid_generate, , 
            [AC_MSG_ERROR([cannot link with -luuid, install uuid-dev.])])
        ;;
    *solaris*)
        # Define on Solaris to enable all library features
        CPPFLAGS="-D_PTHREADS $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_SOLARIS, 1, [Have Solaris OS])
        AC_CHECK_LIB(socket, socket)
        AC_CHECK_LIB(nsl, gethostbyname)
        AC_CHECK_LIB(rt, sem_init)
        AC_CHECK_LIB(uuid, uuid_generate, ,
            [AC_MSG_ERROR([cannot link with -luuid, install uuid-dev.])])
        AC_MSG_CHECKING([whether atomic operations can be used])
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
            [[#include <atomic.h>]],
            [[uint32_t value;
              atomic_cas_32 (&value, 0, 0);
              return 0;]])],
            [solaris_has_atomic=yes],
            [solaris_has_atomic=no])
        AC_MSG_RESULT([$solaris_has_atomic])
        # Solaris 8 does not have atomic operations exported to user space.
        if test "x$solaris_has_atomic" = "xno"; then
            AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
        fi
        ;;
    *freebsd*)
        # Define on FreeBSD to enable all library features
        CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_FREEBSD, 1, [Have FreeBSD OS])
        ;;
    *darwin*)
        # Define on Darwin to enable all library features
        CPPFLAGS="-D_DARWIN_C_SOURCE $CPPFLAGS"
        ac_zmq_pedantic="no"
        ac_zmq_werror="no"
        AC_DEFINE(ZMQ_HAVE_OSX, 1, [Have DarwinOSX OS])
        AC_LANG_PUSH([C++])
        AC_ZMQ_CHECK_LANG_FLAG_PREPEND([-Wno-uninitialized])
        AC_LANG_POP([C++])
        ;;
    *netbsd*)
        # Define on NetBSD to enable all library features
        CPPFLAGS="-D_NETBSD_SOURCE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_NETBSD, 1, [Have NetBSD OS])
        # NetBSD 5.0 and newer provides atomic operations but we can
        # only use these on systems where PR #42842 has been fixed so
        # we must try and link a test program using C++.
        ac_zmq_netbsd_has_atomic=no
        AC_MSG_CHECKING([whether atomic operations can be used])
        AC_LANG_PUSH([C++])
        AC_LINK_IFELSE([AC_LANG_PROGRAM(
            [[#include <atomic.h>]],
            [[uint32_t value;
              atomic_cas_32 (&value, 0, 0);
              return 0;]])],
            [ac_zmq_netbsd_has_atomic=yes],
            [ac_zmq_netbsd_has_atomic=no])
        AC_LANG_POP([C++])
        AC_MSG_RESULT([$ac_zmq_netbsd_has_atomic])
        if test "x$ac_zmq_netbsd_has_atomic" = "xno"; then
            AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
        fi
        ;;
    *openbsd*)
        # Define on OpenBSD to enable all library features
        CPPFLAGS="-D_BSD_SOURCE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_OPENBSD, 1, [Have OpenBSD OS])
        ;;
    *nto-qnx*)
        ac_zmq_pedantic="no"
        AC_DEFINE(ZMQ_HAVE_QNXNTO, 1, [Have QNX Neutrino OS])
        AC_CHECK_LIB(socket, socket)
        AC_CHECK_LIB(crypto, RAND_bytes)
        ;;
    *aix*)
        AC_DEFINE(ZMQ_HAVE_AIX, 1, [Have AIX OS])
        AC_CHECK_LIB(crypto,RAND_bytes)
        ;;
    *hpux*)
        # Define on HP-UX to enable all library features
        CPPFLAGS="-D_POSIX_C_SOURCE=200112L $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_HPUX, 1, [Have HPUX OS])
        AC_CHECK_LIB(rt, sem_init)
        AC_CHECK_LIB(crypto, RAND_bytes)
        ;;
    *mingw32*)
        AC_DEFINE(ZMQ_HAVE_WINDOWS, 1, [Have Windows OS])
        AC_DEFINE(ZMQ_HAVE_MINGW32, 1, [Have MinGW32])
        AC_CHECK_HEADERS(windows.h)
        AC_CHECK_LIB(ws2_32, main, ,
            [AC_MSG_ERROR([cannot link with ws2_32.dll.])])
        AC_CHECK_LIB(rpcrt4, main, ,
            [AC_MSG_ERROR([cannot link with rpcrt4.dll.])])
        AC_CHECK_LIB(iphlpapi, main, ,
            [AC_MSG_ERROR([cannot link with iphlpapi.dll.])])
        # mingw32 defines __int64_t as long long
        AC_LANG_PUSH([C++])
        AC_ZMQ_CHECK_LANG_FLAG_PREPEND([-Wno-long-long])
        AC_LANG_POP([C++])
        ac_zmq_on_mingw32="yes"
        ac_zmq_dso_visibility="no"

        if test "x$enable_static" = "xyes"; then
            AC_MSG_ERROR([Building static libraries is not supported under MinGW32])
        fi
        ;;
    *cygwin*)
        # Define on Cygwin to enable all library features
        CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_CYGWIN, 1, [Have Cygwin])
        # Cygwin provides libuuid as part of the e2fsprogs package, and somewhat
        # uselessly installs the library in /usr/lib/e2fsprogs
        LDFLAGS="-L/usr/lib/e2fsprogs ${LDFLAGS}"
        AC_CHECK_LIB(uuid, uuid_generate, ,
            [AC_MSG_ERROR([cannot link with -luuid, install the e2fsprogs package.])])

        if test "x$enable_static" = "xyes"; then
            AC_MSG_ERROR([Building static libraries is not supported under Cygwin])
        fi
        ;;
    *)
        AC_MSG_ERROR([unsupported system: ${host_os}.])
        ;;
esac

#
# Check if the compiler supports -fvisibility=hidden flag. MinGW32 uses __declspec
#
if test "x$ac_zmq_dso_visibility" = "xyes"; then
    AC_LANG_PUSH([C])
    AC_ZMQ_CHECK_LANG_VISIBILITY([LIBZMQ_EXTRA_CFLAGS="$ac_zmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag ${LIBZMQ_EXTRA_CFLAGS}"])
    AC_LANG_POP([C])

    AC_LANG_PUSH([C++])
    AC_ZMQ_CHECK_LANG_VISIBILITY([LIBZMQ_EXTRA_CXXFLAGS="$ac_zmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag ${LIBZMQ_EXTRA_CXXFLAGS}"])
    AC_LANG_POP([C++])
fi

# CPU-specific optimizations
case "${host_cpu}" in
    *sparc*)
        AC_LANG_PUSH([C++])
        AC_ZMQ_CHECK_LANG_FLAG_PREPEND([-mcpu=v9])
        AC_LANG_POP([C++])
    ;;
    *)
    ;;
esac

# Check whether to build docs / install man pages
AC_ZMQ_CHECK_DOC_BUILD

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(errno.h arpa/inet.h netinet/tcp.h netinet/in.h stddef.h \
stdlib.h string.h sys/socket.h sys/time.h unistd.h limits.h)

# Check if we have ifaddrs.h header file.
AC_CHECK_HEADERS(ifaddrs.h, [AC_DEFINE(ZMQ_HAVE_IFADDRS, 1, [Have ifaddrs.h header.])])

# Use c++ in subsequent tests
AC_LANG_PUSH(C++)

AC_HEADER_STDBOOL
AC_C_CONST
AC_C_INLINE
# Checks for typedefs, structures, and compiler characteristics.
if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
    dnl 279: controlling expression is constant
    dnl Fixes build with ICC 12.x
    AC_ZMQ_CHECK_WITH_FLAG([-wd279], [AC_TYPE_SIZE_T])
    AC_ZMQ_CHECK_WITH_FLAG([-wd279], [AC_TYPE_SSIZE_T])
else
    AC_TYPE_SIZE_T
    AC_TYPE_SSIZE_T
fi
AC_HEADER_TIME
AC_TYPE_UINT32_T
AC_C_VOLATILE

#  PGM extension
ac_zmq_pgm_ext="no"

pgm_basename="libpgm-5.0.92~dfsg"

AC_SUBST(pgm_basename)

AC_ARG_WITH([pgm], [AS_HELP_STRING([--with-pgm], 
    [build libzmq with PGM extension [default=no]])], 
    [with_pgm_ext=yes], [with_pgm_ext=no])

if test "x$with_pgm_ext" != "xno"; then

    if test "x$ac_cv_prog_cc_c99" = "xno"; then
        AC_MSG_WARN([The C compiler is not set to C99 mode. The build will most likely fail])
    fi
    
    AC_MSG_CHECKING([if the PGM extension is supported on this platform])
    # OpenPGM is only supported by the vendor on x86, AMD64, and SPARC platforms...
    case "${host_cpu}" in
        i*86|x86_64|amd64|*sparc*)
            # Supported
        ;;
        *)
            AC_MSG_ERROR([the PGM extension is not supported on the ${host_cpu} platform.])
        ;;
    esac

    # ... and on Linux/Windows/Solaris/FreeBSD/OSX systems.
    case "${host_os}" in
        *linux*|*mingw32*|*solaris*|*freebsd*|*darwin*)
            AC_MSG_RESULT([yes])

            AC_LANG_PUSH([C++])
            AC_ZMQ_CHECK_LANG_FLAG([-Wno-variadic-macros], [LIBZMQ_EXTRA_CXXFLAGS="-Wno-variadic-macros $LIBZMQ_EXTRA_CXXFLAGS"])
            AC_ZMQ_CHECK_LANG_FLAG([-Wno-long-long], [LIBZMQ_EXTRA_CXXFLAGS="-Wno-long-long $LIBZMQ_EXTRA_CXXFLAGS"])
            AC_LANG_POP([C++])

            AC_LANG_PUSH([C])
            AC_ZMQ_LANG_STRICT([LIBZMQ_EXTRA_CFLAGS="$ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag $LIBZMQ_EXTRA_CFLAGS"])

            if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
                    "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
                LIBZMQ_EXTRA_CFLAGS="-Dasm=__asm__ $LIBZMQ_EXTRA_CFLAGS"
            fi
            AC_LANG_POP([C])
        ;;
        *)
            AC_MSG_ERROR([the PGM extension is not supported on system ${host_os}.])
        ;;
    esac

    #  Gzip, Perl and Python are required duing PGM build
    AC_CHECK_PROG(ac_zmq_have_gzip, gzip, yes, no)
    if test "x$ac_zmq_have_gzip" != "xyes"; then
        AC_MSG_ERROR([gzip is required for building the PGM extension.])
    fi
    AC_CHECK_PROG(ac_zmq_have_perl, perl, yes, no)
    if test "x$ac_zmq_have_perl" != "xyes"; then
        AC_MSG_ERROR([perl is required for building the PGM extension.])
    fi
    AC_CHECK_PROG(ac_zmq_have_python, python, yes, no)
    if test "x$ac_zmq_have_python" != "xyes"; then
        AC_MSG_ERROR([python is required for building the PGM extension.])
    fi

    #  Unpack libpgm
    AC_MSG_NOTICE([Unpacking ${pgm_basename}.tar.gz])
    ac_zmq_pwd=`pwd`
    cd foreign/openpgm

    if ! (gzip -dc "${pgm_basename}.tar.gz" || echo "failed") | ${am__untar}; then
        AC_MSG_ERROR([cannot unpack the foreign/openpgm/${pgm_basename}.tar.gz file])
    fi
    cd "${ac_zmq_pwd}"

    #  Success!
    AC_DEFINE(ZMQ_HAVE_OPENPGM, 1, [Have OpenPGM extension])
    ac_zmq_pgm_ext="yes"

    # these break OpenPGM so don't specify them if we are building with it.
    ac_zmq_pedantic="no"
    ac_zmq_werror="no"
fi

# Set -Wall, -Werror and -pedantic
AC_LANG_PUSH([C++])

# Check how to enable -Wall
AC_ZMQ_LANG_WALL([CPPFLAGS="$ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag $CPPFLAGS"])

if test "x$ac_zmq_werror" = "xyes" -a "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" != "xyes"; then
    AC_ZMQ_LANG_WERROR([CPPFLAGS="$ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag $CPPFLAGS"])
fi

if test "x$ac_zmq_pedantic" = "xyes"; then
    AC_ZMQ_LANG_STRICT([CPPFLAGS="$ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag $CPPFLAGS"])
fi
AC_LANG_POP([C++])

AM_CONDITIONAL(BUILD_PGM, test "x$ac_zmq_pgm_ext" = "xyes")
AM_CONDITIONAL(ON_MINGW, test "x$ac_zmq_on_mingw32" = "xyes")

# Subst LIBZMQ_EXTRA_CFLAGS & CXXFLAGS & LDFLAGS
AC_SUBST(LIBZMQ_EXTRA_CFLAGS)
AC_SUBST(LIBZMQ_EXTRA_CXXFLAGS)
AC_SUBST(LIBZMQ_EXTRA_LDFLAGS)

# Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(perror gettimeofday memset socket getifaddrs freeifaddrs)

AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile
    perf/Makefile src/libzmq.pc \
    devices/Makefile devices/zmq_forwarder/Makefile \
    devices/zmq_streamer/Makefile devices/zmq_queue/Makefile \
    builds/msvc/Makefile tests/Makefile])
AC_OUTPUT